John W. Chapman

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Stonehaven, GB

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Patents Grantslast 30 patents

Information Patent Grant
Wellbore fluid
- Patent number 9,574,127
- Issue date Feb 21, 2017
- M-I Drilling Fluids UK Ltd.
- John W. Chapman
- E21 - EARTH DRILLING MINING
Information Patent Grant
Viscosity reducer for water-based muds
- Patent number 8,534,383
- Issue date Sep 17, 2013
- M-I Drilling Fluids UK Limited
- John W. Chapman
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

Information Patent Application
WELLBORE FLUID
- Publication number 20150021027
- Publication date Jan 22, 2015
- M-I DRILLING FLUIDS UK LIMITED
- John W. Chapman
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
INVERT DRILLING FLUIDS
- Publication number 20140182942
- Publication date Jul 3, 2014
- M-I DRILLING FLUIDS UK LIMITED
- Michael Hayward Hodder
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
VISCOSITY REDUCER FOR WATER-BASED MUDS
- Publication number 20110042078
- Publication date Feb 24, 2011
- M-I DRILLING FLUIDS UK LIMITED
- John W. Chapman
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...